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Could be something someone posted in the shoutbox, I dunno, couldn't find anything.. Also, I never had that until now (check the post's timestamp).. now it's appearing every time I visit the front page..

Early this morning when I went to the GBAtemp homepage, (IE7) something tried to start up my MS Office setup, I had to cancel it 3 times before it stopped doing it. I could see in the status bar that it was trying to pull data from some other site. Just now when I came on here, Google Pop-up Blocker caught it.
I'll check back in a few days, this site has definitely been hijacked.